1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
4 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
31 * Code generate the whole fragment pipeline.
33 * The fragment pipeline consists of the following stages:
34 * - triangle edge in/out testing
40 * - depth/stencil test
43 * This file has only the glue to assemble the fragment pipeline. The actual
44 * plumbing of converting Gallium state into LLVM IR is done elsewhere, in the
45 * lp_bld_*.[ch] files, and in a complete generic and reusable way. Here we
46 * muster the LLVM JIT execution engine to create a function that follows an
47 * established binary interface and that can be called from C directly.
49 * A big source of complexity here is that we often want to run different
50 * stages with different precisions and data types and precisions. For example,
51 * the fragment shader needs typically to be done in floats, but the
52 * depth/stencil test and blending is better done in the type that most closely
53 * matches the depth/stencil and color buffer respectively.
55 * Since the width of a SIMD vector register stays the same regardless of the
56 * element type, different types imply different number of elements, so we must
57 * code generate more instances of the stages with larger types to be able to
58 * feed/consume the stages with smaller types.
60 * @author Jose Fonseca <jfonseca@vmware.com>
64 #include "pipe/p_defines.h"
65 #include "util/u_inlines.h"
66 #include "util/u_memory.h"
67 #include "util/u_pointer.h"
68 #include "util/u_format.h"
69 #include "util/u_dump.h"
70 #include "util/u_string.h"
71 #include "util/u_simple_list.h"
72 #include "os/os_time.h"
73 #include "pipe/p_shader_tokens.h"
74 #include "draw/draw_context.h"
75 #include "tgsi/tgsi_dump.h"
76 #include "tgsi/tgsi_scan.h"
77 #include "tgsi/tgsi_parse.h"
78 #include "gallivm/lp_bld_type.h"
79 #include "gallivm/lp_bld_const.h"
80 #include "gallivm/lp_bld_conv.h"
81 #include "gallivm/lp_bld_intr.h"
82 #include "gallivm/lp_bld_logic.h"
83 #include "gallivm/lp_bld_tgsi.h"
84 #include "gallivm/lp_bld_swizzle.h"
85 #include "gallivm/lp_bld_flow.h"
86 #include "gallivm/lp_bld_debug.h"
88 #include "lp_bld_alpha.h"
89 #include "lp_bld_blend.h"
90 #include "lp_bld_depth.h"
91 #include "lp_bld_interp.h"
92 #include "lp_context.h"
95 #include "lp_screen.h"
98 #include "lp_tex_sample.h"
102 #include <llvm-c/Analysis.h>
105 static unsigned fs_no
= 0;
109 * Generate the depth /stencil test code.
112 generate_depth_stencil(LLVMBuilderRef builder
,
113 const struct lp_fragment_shader_variant_key
*key
,
114 struct lp_type src_type
,
115 struct lp_build_mask_context
*mask
,
116 LLVMValueRef stencil_refs
[2],
118 LLVMValueRef dst_ptr
,
120 LLVMValueRef counter
)
122 const struct util_format_description
*format_desc
;
123 struct lp_type dst_type
;
125 if (!key
->depth
.enabled
&& !key
->stencil
[0].enabled
&& !key
->stencil
[1].enabled
)
128 format_desc
= util_format_description(key
->zsbuf_format
);
132 * Depths are expected to be between 0 and 1, even if they are stored in
133 * floats. Setting these bits here will ensure that the lp_build_conv() call
134 * below won't try to unnecessarily clamp the incoming values.
136 if(src_type
.floating
) {
137 src_type
.sign
= FALSE
;
138 src_type
.norm
= TRUE
;
141 assert(!src_type
.sign
);
142 assert(src_type
.norm
);
145 /* Pick the depth type. */
146 dst_type
= lp_depth_type(format_desc
, src_type
.width
*src_type
.length
);
148 /* FIXME: Cope with a depth test type with a different bit width. */
149 assert(dst_type
.width
== src_type
.width
);
150 assert(dst_type
.length
== src_type
.length
);
152 /* Convert fragment Z from float to integer */
153 lp_build_conv(builder
, src_type
, dst_type
, &src
, 1, &src
, 1);
155 dst_ptr
= LLVMBuildBitCast(builder
,
157 LLVMPointerType(lp_build_vec_type(dst_type
), 0), "");
158 lp_build_depth_stencil_test(builder
,
173 * Generate the code to do inside/outside triangle testing for the
174 * four pixels in a 2x2 quad. This will set the four elements of the
175 * quad mask vector to 0 or ~0.
176 * \param i which quad of the quad group to test, in [0,3]
179 generate_tri_edge_mask(LLVMBuilderRef builder
,
181 LLVMValueRef
*mask
, /* ivec4, out */
182 LLVMValueRef c0
, /* int32 */
183 LLVMValueRef c1
, /* int32 */
184 LLVMValueRef c2
, /* int32 */
185 LLVMValueRef step0_ptr
, /* ivec4 */
186 LLVMValueRef step1_ptr
, /* ivec4 */
187 LLVMValueRef step2_ptr
) /* ivec4 */
189 #define OPTIMIZE_IN_OUT_TEST 0
190 #if OPTIMIZE_IN_OUT_TEST
191 struct lp_build_if_state ifctx
;
192 LLVMValueRef not_draw_all
;
194 struct lp_build_flow_context
*flow
;
195 struct lp_type i32_type
;
196 LLVMTypeRef i32vec4_type
;
197 LLVMValueRef c0_vec
, c1_vec
, c2_vec
;
198 LLVMValueRef in_out_mask
;
202 /* int32 vector type */
203 memset(&i32_type
, 0, sizeof i32_type
);
204 i32_type
.floating
= FALSE
; /* values are integers */
205 i32_type
.sign
= TRUE
; /* values are signed */
206 i32_type
.norm
= FALSE
; /* values are not normalized */
207 i32_type
.width
= 32; /* 32-bit int values */
208 i32_type
.length
= 4; /* 4 elements per vector */
210 i32vec4_type
= lp_build_int32_vec4_type();
213 * Use a conditional here to do detailed pixel in/out testing.
214 * We only have to do this if c0 != INT_MIN.
216 flow
= lp_build_flow_create(builder
);
217 lp_build_flow_scope_begin(flow
);
220 #if OPTIMIZE_IN_OUT_TEST
221 /* not_draw_all = (c0 != INT_MIN) */
222 not_draw_all
= LLVMBuildICmp(builder
,
225 LLVMConstInt(LLVMInt32Type(), INT_MIN
, 0),
228 in_out_mask
= lp_build_const_int_vec(i32_type
, ~0);
231 lp_build_flow_scope_declare(flow
, &in_out_mask
);
233 /* if (not_draw_all) {... */
234 lp_build_if(&ifctx
, flow
, builder
, not_draw_all
);
237 LLVMValueRef step0_vec
, step1_vec
, step2_vec
;
238 LLVMValueRef m0_vec
, m1_vec
, m2_vec
;
239 LLVMValueRef index
, m
;
241 /* c0_vec = {c0, c0, c0, c0}
242 * Note that we emit this code four times but LLVM optimizes away
243 * three instances of it.
245 c0_vec
= lp_build_broadcast(builder
, i32vec4_type
, c0
);
246 c1_vec
= lp_build_broadcast(builder
, i32vec4_type
, c1
);
247 c2_vec
= lp_build_broadcast(builder
, i32vec4_type
, c2
);
248 lp_build_name(c0_vec
, "edgeconst0vec");
249 lp_build_name(c1_vec
, "edgeconst1vec");
250 lp_build_name(c2_vec
, "edgeconst2vec");
252 /* load step0vec, step1, step2 vec from memory */
253 index
= LLVMConstInt(LLVMInt32Type(), i
, 0);
254 step0_vec
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, step0_ptr
, &index
, 1, ""), "");
255 step1_vec
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, step1_ptr
, &index
, 1, ""), "");
256 step2_vec
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, step2_ptr
, &index
, 1, ""), "");
257 lp_build_name(step0_vec
, "step0vec");
258 lp_build_name(step1_vec
, "step1vec");
259 lp_build_name(step2_vec
, "step2vec");
261 /* m0_vec = step0_ptr[i] > c0_vec */
262 m0_vec
= lp_build_compare(builder
, i32_type
, PIPE_FUNC_GREATER
, step0_vec
, c0_vec
);
263 m1_vec
= lp_build_compare(builder
, i32_type
, PIPE_FUNC_GREATER
, step1_vec
, c1_vec
);
264 m2_vec
= lp_build_compare(builder
, i32_type
, PIPE_FUNC_GREATER
, step2_vec
, c2_vec
);
266 /* in_out_mask = m0_vec & m1_vec & m2_vec */
267 m
= LLVMBuildAnd(builder
, m0_vec
, m1_vec
, "");
268 in_out_mask
= LLVMBuildAnd(builder
, m
, m2_vec
, "");
269 lp_build_name(in_out_mask
, "inoutmaskvec");
271 #if OPTIMIZE_IN_OUT_TEST
272 lp_build_endif(&ifctx
);
276 lp_build_flow_scope_end(flow
);
277 lp_build_flow_destroy(flow
);
279 /* This is the initial alive/dead pixel mask for a quad of four pixels.
280 * It's an int[4] vector with each word set to 0 or ~0.
281 * Words will get cleared when pixels faile the Z test, etc.
288 generate_scissor_test(LLVMBuilderRef builder
,
289 LLVMValueRef context_ptr
,
290 const struct lp_build_interp_soa_context
*interp
,
293 LLVMTypeRef vec_type
= lp_build_vec_type(type
);
294 LLVMValueRef xpos
= interp
->pos
[0], ypos
= interp
->pos
[1];
295 LLVMValueRef xmin
, ymin
, xmax
, ymax
;
296 LLVMValueRef m0
, m1
, m2
, m3
, m
;
298 /* xpos, ypos contain the window coords for the four pixels in the quad */
302 /* get the current scissor bounds, convert to vectors */
303 xmin
= lp_jit_context_scissor_xmin_value(builder
, context_ptr
);
304 xmin
= lp_build_broadcast(builder
, vec_type
, xmin
);
306 ymin
= lp_jit_context_scissor_ymin_value(builder
, context_ptr
);
307 ymin
= lp_build_broadcast(builder
, vec_type
, ymin
);
309 xmax
= lp_jit_context_scissor_xmax_value(builder
, context_ptr
);
310 xmax
= lp_build_broadcast(builder
, vec_type
, xmax
);
312 ymax
= lp_jit_context_scissor_ymax_value(builder
, context_ptr
);
313 ymax
= lp_build_broadcast(builder
, vec_type
, ymax
);
315 /* compare the fragment's position coordinates against the scissor bounds */
316 m0
= lp_build_compare(builder
, type
, PIPE_FUNC_GEQUAL
, xpos
, xmin
);
317 m1
= lp_build_compare(builder
, type
, PIPE_FUNC_GEQUAL
, ypos
, ymin
);
318 m2
= lp_build_compare(builder
, type
, PIPE_FUNC_LESS
, xpos
, xmax
);
319 m3
= lp_build_compare(builder
, type
, PIPE_FUNC_LESS
, ypos
, ymax
);
321 /* AND all the masks together */
322 m
= LLVMBuildAnd(builder
, m0
, m1
, "");
323 m
= LLVMBuildAnd(builder
, m
, m2
, "");
324 m
= LLVMBuildAnd(builder
, m
, m3
, "");
326 lp_build_name(m
, "scissormask");
333 build_int32_vec_const(int value
)
335 struct lp_type i32_type
;
337 memset(&i32_type
, 0, sizeof i32_type
);
338 i32_type
.floating
= FALSE
; /* values are integers */
339 i32_type
.sign
= TRUE
; /* values are signed */
340 i32_type
.norm
= FALSE
; /* values are not normalized */
341 i32_type
.width
= 32; /* 32-bit int values */
342 i32_type
.length
= 4; /* 4 elements per vector */
343 return lp_build_const_int_vec(i32_type
, value
);
349 * Generate the fragment shader, depth/stencil test, and alpha tests.
350 * \param i which quad in the tile, in range [0,3]
351 * \param do_tri_test if 1, do triangle edge in/out testing
354 generate_fs(struct llvmpipe_context
*lp
,
355 struct lp_fragment_shader
*shader
,
356 const struct lp_fragment_shader_variant_key
*key
,
357 LLVMBuilderRef builder
,
359 LLVMValueRef context_ptr
,
361 const struct lp_build_interp_soa_context
*interp
,
362 struct lp_build_sampler_soa
*sampler
,
364 LLVMValueRef (*color
)[4],
365 LLVMValueRef depth_ptr
,
367 unsigned do_tri_test
,
371 LLVMValueRef step0_ptr
,
372 LLVMValueRef step1_ptr
,
373 LLVMValueRef step2_ptr
,
374 LLVMValueRef counter
)
376 const struct tgsi_token
*tokens
= shader
->base
.tokens
;
377 LLVMTypeRef vec_type
;
378 LLVMValueRef consts_ptr
;
379 LLVMValueRef outputs
[PIPE_MAX_SHADER_OUTPUTS
][NUM_CHANNELS
];
380 LLVMValueRef z
= interp
->pos
[2];
381 LLVMValueRef stencil_refs
[2];
382 struct lp_build_flow_context
*flow
;
383 struct lp_build_mask_context mask
;
384 boolean early_depth_stencil_test
;
391 stencil_refs
[0] = lp_jit_context_stencil_ref_front_value(builder
, context_ptr
);
392 stencil_refs
[1] = lp_jit_context_stencil_ref_back_value(builder
, context_ptr
);
394 vec_type
= lp_build_vec_type(type
);
396 consts_ptr
= lp_jit_context_constants(builder
, context_ptr
);
398 flow
= lp_build_flow_create(builder
);
400 memset(outputs
, 0, sizeof outputs
);
402 lp_build_flow_scope_begin(flow
);
404 /* Declare the color and z variables */
405 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
406 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
) {
407 color
[cbuf
][chan
] = LLVMGetUndef(vec_type
);
408 lp_build_flow_scope_declare(flow
, &color
[cbuf
][chan
]);
411 lp_build_flow_scope_declare(flow
, &z
);
413 /* do triangle edge testing */
415 generate_tri_edge_mask(builder
, i
, pmask
,
416 c0
, c1
, c2
, step0_ptr
, step1_ptr
, step2_ptr
);
419 *pmask
= build_int32_vec_const(~0);
422 /* 'mask' will control execution based on quad's pixel alive/killed state */
423 lp_build_mask_begin(&mask
, flow
, type
, *pmask
);
427 generate_scissor_test(builder
, context_ptr
, interp
, type
);
428 lp_build_mask_update(&mask
, smask
);
431 early_depth_stencil_test
=
432 (key
->depth
.enabled
|| key
->stencil
[0].enabled
) &&
433 !key
->alpha
.enabled
&&
434 !shader
->info
.uses_kill
&&
435 !shader
->info
.writes_z
;
437 if (early_depth_stencil_test
)
438 generate_depth_stencil(builder
, key
,
440 stencil_refs
, z
, depth_ptr
, facing
, counter
);
442 lp_build_tgsi_soa(builder
, tokens
, type
, &mask
,
443 consts_ptr
, interp
->pos
, interp
->inputs
,
444 outputs
, sampler
, &shader
->info
);
446 /* loop over fragment shader outputs/results */
447 for (attrib
= 0; attrib
< shader
->info
.num_outputs
; ++attrib
) {
448 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
) {
449 if(outputs
[attrib
][chan
]) {
450 LLVMValueRef out
= LLVMBuildLoad(builder
, outputs
[attrib
][chan
], "");
451 lp_build_name(out
, "output%u.%u.%c", i
, attrib
, "xyzw"[chan
]);
453 switch (shader
->info
.output_semantic_name
[attrib
]) {
454 case TGSI_SEMANTIC_COLOR
:
456 unsigned cbuf
= shader
->info
.output_semantic_index
[attrib
];
458 lp_build_name(out
, "color%u.%u.%c", i
, attrib
, "rgba"[chan
]);
461 /* XXX: should the alpha reference value be passed separately? */
462 /* XXX: should only test the final assignment to alpha */
463 if(cbuf
== 0 && chan
== 3) {
464 LLVMValueRef alpha
= out
;
465 LLVMValueRef alpha_ref_value
;
466 alpha_ref_value
= lp_jit_context_alpha_ref_value(builder
, context_ptr
);
467 alpha_ref_value
= lp_build_broadcast(builder
, vec_type
, alpha_ref_value
);
468 lp_build_alpha_test(builder
, &key
->alpha
, type
,
469 &mask
, alpha
, alpha_ref_value
);
472 color
[cbuf
][chan
] = out
;
476 case TGSI_SEMANTIC_POSITION
:
485 if (!early_depth_stencil_test
)
486 generate_depth_stencil(builder
, key
,
488 stencil_refs
, z
, depth_ptr
, facing
, counter
);
490 lp_build_mask_end(&mask
);
492 lp_build_flow_scope_end(flow
);
494 lp_build_flow_destroy(flow
);
502 * Generate color blending and color output.
503 * \param rt the render target index (to index blend, colormask state)
504 * \param type the pixel color type
505 * \param context_ptr pointer to the runtime JIT context
506 * \param mask execution mask (active fragment/pixel mask)
507 * \param src colors from the fragment shader
508 * \param dst_ptr the destination color buffer pointer
511 generate_blend(const struct pipe_blend_state
*blend
,
513 LLVMBuilderRef builder
,
515 LLVMValueRef context_ptr
,
518 LLVMValueRef dst_ptr
)
520 struct lp_build_context bld
;
521 struct lp_build_flow_context
*flow
;
522 struct lp_build_mask_context mask_ctx
;
523 LLVMTypeRef vec_type
;
524 LLVMValueRef const_ptr
;
530 lp_build_context_init(&bld
, builder
, type
);
532 flow
= lp_build_flow_create(builder
);
534 /* we'll use this mask context to skip blending if all pixels are dead */
535 lp_build_mask_begin(&mask_ctx
, flow
, type
, mask
);
537 vec_type
= lp_build_vec_type(type
);
539 const_ptr
= lp_jit_context_blend_color(builder
, context_ptr
);
540 const_ptr
= LLVMBuildBitCast(builder
, const_ptr
,
541 LLVMPointerType(vec_type
, 0), "");
543 /* load constant blend color and colors from the dest color buffer */
544 for(chan
= 0; chan
< 4; ++chan
) {
545 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), chan
, 0);
546 con
[chan
] = LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, const_ptr
, &index
, 1, ""), "");
548 dst
[chan
] = LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, dst_ptr
, &index
, 1, ""), "");
550 lp_build_name(con
[chan
], "con.%c", "rgba"[chan
]);
551 lp_build_name(dst
[chan
], "dst.%c", "rgba"[chan
]);
555 lp_build_blend_soa(builder
, blend
, type
, rt
, src
, dst
, con
, res
);
557 /* store results to color buffer */
558 for(chan
= 0; chan
< 4; ++chan
) {
559 if(blend
->rt
[rt
].colormask
& (1 << chan
)) {
560 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), chan
, 0);
561 lp_build_name(res
[chan
], "res.%c", "rgba"[chan
]);
562 res
[chan
] = lp_build_select(&bld
, mask
, res
[chan
], dst
[chan
]);
563 LLVMBuildStore(builder
, res
[chan
], LLVMBuildGEP(builder
, dst_ptr
, &index
, 1, ""));
567 lp_build_mask_end(&mask_ctx
);
568 lp_build_flow_destroy(flow
);
573 * Generate the runtime callable function for the whole fragment pipeline.
574 * Note that the function which we generate operates on a block of 16
575 * pixels at at time. The block contains 2x2 quads. Each quad contains
579 generate_fragment(struct llvmpipe_context
*lp
,
580 struct lp_fragment_shader
*shader
,
581 struct lp_fragment_shader_variant
*variant
,
582 unsigned do_tri_test
)
584 struct llvmpipe_screen
*screen
= llvmpipe_screen(lp
->pipe
.screen
);
585 const struct lp_fragment_shader_variant_key
*key
= &variant
->key
;
587 struct lp_type fs_type
;
588 struct lp_type blend_type
;
589 LLVMTypeRef fs_elem_type
;
590 LLVMTypeRef fs_int_vec_type
;
591 LLVMTypeRef blend_vec_type
;
592 LLVMTypeRef arg_types
[16];
593 LLVMTypeRef func_type
;
594 LLVMTypeRef int32_vec4_type
= lp_build_int32_vec4_type();
595 LLVMValueRef context_ptr
;
599 LLVMValueRef dadx_ptr
;
600 LLVMValueRef dady_ptr
;
601 LLVMValueRef color_ptr_ptr
;
602 LLVMValueRef depth_ptr
;
603 LLVMValueRef c0
, c1
, c2
, step0_ptr
, step1_ptr
, step2_ptr
, counter
= NULL
;
604 LLVMBasicBlockRef block
;
605 LLVMBuilderRef builder
;
606 struct lp_build_sampler_soa
*sampler
;
607 struct lp_build_interp_soa_context interp
;
608 LLVMValueRef fs_mask
[LP_MAX_VECTOR_LENGTH
];
609 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][NUM_CHANNELS
][LP_MAX_VECTOR_LENGTH
];
610 LLVMValueRef blend_mask
;
611 LLVMValueRef function
;
619 /* TODO: actually pick these based on the fs and color buffer
620 * characteristics. */
622 memset(&fs_type
, 0, sizeof fs_type
);
623 fs_type
.floating
= TRUE
; /* floating point values */
624 fs_type
.sign
= TRUE
; /* values are signed */
625 fs_type
.norm
= FALSE
; /* values are not limited to [0,1] or [-1,1] */
626 fs_type
.width
= 32; /* 32-bit float */
627 fs_type
.length
= 4; /* 4 elements per vector */
628 num_fs
= 4; /* number of quads per block */
630 memset(&blend_type
, 0, sizeof blend_type
);
631 blend_type
.floating
= FALSE
; /* values are integers */
632 blend_type
.sign
= FALSE
; /* values are unsigned */
633 blend_type
.norm
= TRUE
; /* values are in [0,1] or [-1,1] */
634 blend_type
.width
= 8; /* 8-bit ubyte values */
635 blend_type
.length
= 16; /* 16 elements per vector */
638 * Generate the function prototype. Any change here must be reflected in
639 * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa.
642 fs_elem_type
= lp_build_elem_type(fs_type
);
643 fs_int_vec_type
= lp_build_int_vec_type(fs_type
);
645 blend_vec_type
= lp_build_vec_type(blend_type
);
647 util_snprintf(func_name
, sizeof(func_name
), "fs%u_variant%u_%s",
648 shader
->no
, variant
->no
, do_tri_test
? "edge" : "whole");
650 arg_types
[0] = screen
->context_ptr_type
; /* context */
651 arg_types
[1] = LLVMInt32Type(); /* x */
652 arg_types
[2] = LLVMInt32Type(); /* y */
653 arg_types
[3] = LLVMFloatType(); /* facing */
654 arg_types
[4] = LLVMPointerType(fs_elem_type
, 0); /* a0 */
655 arg_types
[5] = LLVMPointerType(fs_elem_type
, 0); /* dadx */
656 arg_types
[6] = LLVMPointerType(fs_elem_type
, 0); /* dady */
657 arg_types
[7] = LLVMPointerType(LLVMPointerType(blend_vec_type
, 0), 0); /* color */
658 arg_types
[8] = LLVMPointerType(fs_int_vec_type
, 0); /* depth */
659 arg_types
[9] = LLVMInt32Type(); /* c0 */
660 arg_types
[10] = LLVMInt32Type(); /* c1 */
661 arg_types
[11] = LLVMInt32Type(); /* c2 */
662 /* Note: the step arrays are built as int32[16] but we interpret
663 * them here as int32_vec4[4].
665 arg_types
[12] = LLVMPointerType(int32_vec4_type
, 0);/* step0 */
666 arg_types
[13] = LLVMPointerType(int32_vec4_type
, 0);/* step1 */
667 arg_types
[14] = LLVMPointerType(int32_vec4_type
, 0);/* step2 */
668 arg_types
[15] = LLVMPointerType(LLVMInt32Type(), 0);/* counter */
670 func_type
= LLVMFunctionType(LLVMVoidType(), arg_types
, Elements(arg_types
), 0);
672 function
= LLVMAddFunction(screen
->module
, func_name
, func_type
);
673 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
675 variant
->function
[do_tri_test
] = function
;
678 /* XXX: need to propagate noalias down into color param now we are
679 * passing a pointer-to-pointer?
681 for(i
= 0; i
< Elements(arg_types
); ++i
)
682 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
)
683 LLVMAddAttribute(LLVMGetParam(function
, i
), LLVMNoAliasAttribute
);
685 context_ptr
= LLVMGetParam(function
, 0);
686 x
= LLVMGetParam(function
, 1);
687 y
= LLVMGetParam(function
, 2);
688 facing
= LLVMGetParam(function
, 3);
689 a0_ptr
= LLVMGetParam(function
, 4);
690 dadx_ptr
= LLVMGetParam(function
, 5);
691 dady_ptr
= LLVMGetParam(function
, 6);
692 color_ptr_ptr
= LLVMGetParam(function
, 7);
693 depth_ptr
= LLVMGetParam(function
, 8);
694 c0
= LLVMGetParam(function
, 9);
695 c1
= LLVMGetParam(function
, 10);
696 c2
= LLVMGetParam(function
, 11);
697 step0_ptr
= LLVMGetParam(function
, 12);
698 step1_ptr
= LLVMGetParam(function
, 13);
699 step2_ptr
= LLVMGetParam(function
, 14);
701 lp_build_name(context_ptr
, "context");
702 lp_build_name(x
, "x");
703 lp_build_name(y
, "y");
704 lp_build_name(a0_ptr
, "a0");
705 lp_build_name(dadx_ptr
, "dadx");
706 lp_build_name(dady_ptr
, "dady");
707 lp_build_name(color_ptr_ptr
, "color_ptr_ptr");
708 lp_build_name(depth_ptr
, "depth");
709 lp_build_name(c0
, "c0");
710 lp_build_name(c1
, "c1");
711 lp_build_name(c2
, "c2");
712 lp_build_name(step0_ptr
, "step0");
713 lp_build_name(step1_ptr
, "step1");
714 lp_build_name(step2_ptr
, "step2");
716 if (key
->occlusion_count
) {
717 counter
= LLVMGetParam(function
, 15);
718 lp_build_name(counter
, "counter");
725 block
= LLVMAppendBasicBlock(function
, "entry");
726 builder
= LLVMCreateBuilder();
727 LLVMPositionBuilderAtEnd(builder
, block
);
730 * The shader input interpolation info is not explicitely baked in the
731 * shader key, but everything it derives from (TGSI, and flatshade) is
732 * already included in the shader key.
734 lp_build_interp_soa_init(&interp
,
738 a0_ptr
, dadx_ptr
, dady_ptr
,
741 /* code generated texture sampling */
742 sampler
= lp_llvm_sampler_soa_create(key
->sampler
, context_ptr
);
744 /* loop over quads in the block */
745 for(i
= 0; i
< num_fs
; ++i
) {
746 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), i
, 0);
747 LLVMValueRef out_color
[PIPE_MAX_COLOR_BUFS
][NUM_CHANNELS
];
748 LLVMValueRef depth_ptr_i
;
751 lp_build_interp_soa_update(&interp
, i
);
753 depth_ptr_i
= LLVMBuildGEP(builder
, depth_ptr
, &index
, 1, "");
755 generate_fs(lp
, shader
, key
,
762 &fs_mask
[i
], /* output */
768 step0_ptr
, step1_ptr
, step2_ptr
, counter
);
770 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++)
771 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
)
772 fs_out_color
[cbuf
][chan
][i
] = out_color
[cbuf
][chan
];
775 sampler
->destroy(sampler
);
777 /* Loop over color outputs / color buffers to do blending.
779 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
780 LLVMValueRef color_ptr
;
781 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), cbuf
, 0);
782 LLVMValueRef blend_in_color
[NUM_CHANNELS
];
786 * Convert the fs's output color and mask to fit to the blending type.
788 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
) {
789 lp_build_conv(builder
, fs_type
, blend_type
,
790 fs_out_color
[cbuf
][chan
], num_fs
,
791 &blend_in_color
[chan
], 1);
792 lp_build_name(blend_in_color
[chan
], "color%d.%c", cbuf
, "rgba"[chan
]);
795 lp_build_conv_mask(builder
, fs_type
, blend_type
,
799 color_ptr
= LLVMBuildLoad(builder
,
800 LLVMBuildGEP(builder
, color_ptr_ptr
, &index
, 1, ""),
802 lp_build_name(color_ptr
, "color_ptr%d", cbuf
);
804 /* which blend/colormask state to use */
805 rt
= key
->blend
.independent_blend_enable
? cbuf
: 0;
810 generate_blend(&key
->blend
,
820 LLVMBuildRetVoid(builder
);
822 LLVMDisposeBuilder(builder
);
825 /* Verify the LLVM IR. If invalid, dump and abort */
827 if(LLVMVerifyFunction(function
, LLVMPrintMessageAction
)) {
829 lp_debug_dump_value(function
);
834 /* Apply optimizations to LLVM IR */
836 LLVMRunFunctionPassManager(screen
->pass
, function
);
838 if (gallivm_debug
& GALLIVM_DEBUG_IR
) {
839 /* Print the LLVM IR to stderr */
840 lp_debug_dump_value(function
);
845 * Translate the LLVM IR into machine code.
848 void *f
= LLVMGetPointerToGlobal(screen
->engine
, function
);
850 variant
->jit_function
[do_tri_test
] = (lp_jit_frag_func
)pointer_to_func(f
);
852 if (gallivm_debug
& GALLIVM_DEBUG_ASM
) {
860 dump_fs_variant_key(const struct lp_fragment_shader_variant_key
*key
)
864 debug_printf("fs variant %p:\n", (void *) key
);
866 if (key
->depth
.enabled
) {
867 debug_printf("depth.format = %s\n", util_format_name(key
->zsbuf_format
));
868 debug_printf("depth.func = %s\n", util_dump_func(key
->depth
.func
, TRUE
));
869 debug_printf("depth.writemask = %u\n", key
->depth
.writemask
);
872 for (i
= 0; i
< 2; ++i
) {
873 if (key
->stencil
[i
].enabled
) {
874 debug_printf("stencil[%u].func = %s\n", i
, util_dump_func(key
->stencil
[i
].func
, TRUE
));
875 debug_printf("stencil[%u].fail_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].fail_op
, TRUE
));
876 debug_printf("stencil[%u].zpass_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].zpass_op
, TRUE
));
877 debug_printf("stencil[%u].zfail_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].zfail_op
, TRUE
));
878 debug_printf("stencil[%u].valuemask = 0x%x\n", i
, key
->stencil
[i
].valuemask
);
879 debug_printf("stencil[%u].writemask = 0x%x\n", i
, key
->stencil
[i
].writemask
);
883 if (key
->alpha
.enabled
) {
884 debug_printf("alpha.func = %s\n", util_dump_func(key
->alpha
.func
, TRUE
));
885 debug_printf("alpha.ref_value = %f\n", key
->alpha
.ref_value
);
888 if (key
->blend
.logicop_enable
) {
889 debug_printf("blend.logicop_func = %s\n", util_dump_logicop(key
->blend
.logicop_func
, TRUE
));
891 else if (key
->blend
.rt
[0].blend_enable
) {
892 debug_printf("blend.rgb_func = %s\n", util_dump_blend_func (key
->blend
.rt
[0].rgb_func
, TRUE
));
893 debug_printf("blend.rgb_src_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].rgb_src_factor
, TRUE
));
894 debug_printf("blend.rgb_dst_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].rgb_dst_factor
, TRUE
));
895 debug_printf("blend.alpha_func = %s\n", util_dump_blend_func (key
->blend
.rt
[0].alpha_func
, TRUE
));
896 debug_printf("blend.alpha_src_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].alpha_src_factor
, TRUE
));
897 debug_printf("blend.alpha_dst_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].alpha_dst_factor
, TRUE
));
899 debug_printf("blend.colormask = 0x%x\n", key
->blend
.rt
[0].colormask
);
900 for (i
= 0; i
< PIPE_MAX_SAMPLERS
; ++i
) {
901 if (key
->sampler
[i
].format
) {
902 debug_printf("sampler[%u] = \n", i
);
903 debug_printf(" .format = %s\n",
904 util_format_name(key
->sampler
[i
].format
));
905 debug_printf(" .target = %s\n",
906 util_dump_tex_target(key
->sampler
[i
].target
, TRUE
));
907 debug_printf(" .pot = %u %u %u\n",
908 key
->sampler
[i
].pot_width
,
909 key
->sampler
[i
].pot_height
,
910 key
->sampler
[i
].pot_depth
);
911 debug_printf(" .wrap = %s %s %s\n",
912 util_dump_tex_wrap(key
->sampler
[i
].wrap_s
, TRUE
),
913 util_dump_tex_wrap(key
->sampler
[i
].wrap_t
, TRUE
),
914 util_dump_tex_wrap(key
->sampler
[i
].wrap_r
, TRUE
));
915 debug_printf(" .min_img_filter = %s\n",
916 util_dump_tex_filter(key
->sampler
[i
].min_img_filter
, TRUE
));
917 debug_printf(" .min_mip_filter = %s\n",
918 util_dump_tex_mipfilter(key
->sampler
[i
].min_mip_filter
, TRUE
));
919 debug_printf(" .mag_img_filter = %s\n",
920 util_dump_tex_filter(key
->sampler
[i
].mag_img_filter
, TRUE
));
921 if (key
->sampler
[i
].compare_mode
!= PIPE_TEX_COMPARE_NONE
)
922 debug_printf(" .compare_func = %s\n", util_dump_func(key
->sampler
[i
].compare_func
, TRUE
));
923 debug_printf(" .normalized_coords = %u\n", key
->sampler
[i
].normalized_coords
);
930 static struct lp_fragment_shader_variant
*
931 generate_variant(struct llvmpipe_context
*lp
,
932 struct lp_fragment_shader
*shader
,
933 const struct lp_fragment_shader_variant_key
*key
)
935 struct lp_fragment_shader_variant
*variant
;
937 variant
= CALLOC_STRUCT(lp_fragment_shader_variant
);
941 variant
->shader
= shader
;
942 variant
->list_item_global
.base
= variant
;
943 variant
->list_item_local
.base
= variant
;
944 variant
->no
= shader
->variants_created
++;
946 memcpy(&variant
->key
, key
, sizeof *key
);
948 if (gallivm_debug
& GALLIVM_DEBUG_IR
) {
949 debug_printf("llvmpipe: Creating fragment shader #%u variant #%u:\n",
950 shader
->no
, variant
->no
);
951 tgsi_dump(shader
->base
.tokens
, 0);
952 dump_fs_variant_key(key
);
955 generate_fragment(lp
, shader
, variant
, RAST_WHOLE
);
956 generate_fragment(lp
, shader
, variant
, RAST_EDGE_TEST
);
958 /* TODO: most of these can be relaxed, in particular the colormask */
960 !key
->blend
.logicop_enable
&&
961 !key
->blend
.rt
[0].blend_enable
&&
962 key
->blend
.rt
[0].colormask
== 0xf &&
963 !key
->stencil
[0].enabled
&&
964 !key
->alpha
.enabled
&&
965 !key
->depth
.enabled
&&
967 !shader
->info
.uses_kill
975 llvmpipe_create_fs_state(struct pipe_context
*pipe
,
976 const struct pipe_shader_state
*templ
)
978 struct lp_fragment_shader
*shader
;
980 shader
= CALLOC_STRUCT(lp_fragment_shader
);
984 shader
->no
= fs_no
++;
985 make_empty_list(&shader
->variants
);
987 /* get/save the summary info for this shader */
988 tgsi_scan_shader(templ
->tokens
, &shader
->info
);
990 /* we need to keep a local copy of the tokens */
991 shader
->base
.tokens
= tgsi_dup_tokens(templ
->tokens
);
993 if (LP_DEBUG
& DEBUG_TGSI
) {
995 debug_printf("llvmpipe: Create fragment shader #%u %p:\n", shader
->no
, (void *) shader
);
996 tgsi_dump(templ
->tokens
, 0);
997 debug_printf("usage masks:\n");
998 for (attrib
= 0; attrib
< shader
->info
.num_inputs
; ++attrib
) {
999 unsigned usage_mask
= shader
->info
.input_usage_mask
[attrib
];
1000 debug_printf(" IN[%u].%s%s%s%s\n",
1002 usage_mask
& TGSI_WRITEMASK_X
? "x" : "",
1003 usage_mask
& TGSI_WRITEMASK_Y
? "y" : "",
1004 usage_mask
& TGSI_WRITEMASK_Z
? "z" : "",
1005 usage_mask
& TGSI_WRITEMASK_W
? "w" : "");
1015 llvmpipe_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
1017 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
1019 if (llvmpipe
->fs
== fs
)
1022 draw_flush(llvmpipe
->draw
);
1026 llvmpipe
->dirty
|= LP_NEW_FS
;
1030 remove_shader_variant(struct llvmpipe_context
*lp
,
1031 struct lp_fragment_shader_variant
*variant
)
1033 struct llvmpipe_screen
*screen
= llvmpipe_screen(lp
->pipe
.screen
);
1036 if (gallivm_debug
& GALLIVM_DEBUG_IR
) {
1037 debug_printf("llvmpipe: del fs #%u var #%u v created #%u v cached #%u v total cached #%u\n",
1038 variant
->shader
->no
, variant
->no
, variant
->shader
->variants_created
,
1039 variant
->shader
->variants_cached
, lp
->nr_fs_variants
);
1041 for (i
= 0; i
< Elements(variant
->function
); i
++) {
1042 if (variant
->function
[i
]) {
1043 if (variant
->jit_function
[i
])
1044 LLVMFreeMachineCodeForFunction(screen
->engine
,
1045 variant
->function
[i
]);
1046 LLVMDeleteFunction(variant
->function
[i
]);
1049 remove_from_list(&variant
->list_item_local
);
1050 variant
->shader
->variants_cached
--;
1051 remove_from_list(&variant
->list_item_global
);
1052 lp
->nr_fs_variants
--;
1057 llvmpipe_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
1059 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
1060 struct pipe_fence_handle
*fence
= NULL
;
1061 struct lp_fragment_shader
*shader
= fs
;
1062 struct lp_fs_variant_list_item
*li
;
1064 assert(fs
!= llvmpipe
->fs
);
1068 * XXX: we need to flush the context until we have some sort of reference
1069 * counting in fragment shaders as they may still be binned
1070 * Flushing alone might not sufficient we need to wait on it too.
1073 llvmpipe_flush(pipe
, 0, &fence
);
1076 pipe
->screen
->fence_finish(pipe
->screen
, fence
, 0);
1077 pipe
->screen
->fence_reference(pipe
->screen
, &fence
, NULL
);
1080 li
= first_elem(&shader
->variants
);
1081 while(!at_end(&shader
->variants
, li
)) {
1082 struct lp_fs_variant_list_item
*next
= next_elem(li
);
1083 remove_shader_variant(llvmpipe
, li
->base
);
1087 assert(shader
->variants_cached
== 0);
1088 FREE((void *) shader
->base
.tokens
);
1095 llvmpipe_set_constant_buffer(struct pipe_context
*pipe
,
1096 uint shader
, uint index
,
1097 struct pipe_resource
*constants
)
1099 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
1100 unsigned size
= constants
? constants
->width0
: 0;
1101 const void *data
= constants
? llvmpipe_resource_data(constants
) : NULL
;
1103 assert(shader
< PIPE_SHADER_TYPES
);
1104 assert(index
< PIPE_MAX_CONSTANT_BUFFERS
);
1106 if(llvmpipe
->constants
[shader
][index
] == constants
)
1109 draw_flush(llvmpipe
->draw
);
1111 /* note: reference counting */
1112 pipe_resource_reference(&llvmpipe
->constants
[shader
][index
], constants
);
1114 if(shader
== PIPE_SHADER_VERTEX
||
1115 shader
== PIPE_SHADER_GEOMETRY
) {
1116 draw_set_mapped_constant_buffer(llvmpipe
->draw
, shader
,
1120 llvmpipe
->dirty
|= LP_NEW_CONSTANTS
;
1125 * Return the blend factor equivalent to a destination alpha of one.
1127 static INLINE
unsigned
1128 force_dst_alpha_one(unsigned factor
, boolean alpha
)
1131 case PIPE_BLENDFACTOR_DST_ALPHA
:
1132 return PIPE_BLENDFACTOR_ONE
;
1133 case PIPE_BLENDFACTOR_INV_DST_ALPHA
:
1134 return PIPE_BLENDFACTOR_ZERO
;
1135 case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
:
1136 return PIPE_BLENDFACTOR_ZERO
;
1141 case PIPE_BLENDFACTOR_DST_COLOR
:
1142 return PIPE_BLENDFACTOR_ONE
;
1143 case PIPE_BLENDFACTOR_INV_DST_COLOR
:
1144 return PIPE_BLENDFACTOR_ZERO
;
1153 * We need to generate several variants of the fragment pipeline to match
1154 * all the combinations of the contributing state atoms.
1156 * TODO: there is actually no reason to tie this to context state -- the
1157 * generated code could be cached globally in the screen.
1160 make_variant_key(struct llvmpipe_context
*lp
,
1161 struct lp_fragment_shader
*shader
,
1162 struct lp_fragment_shader_variant_key
*key
)
1166 memset(key
, 0, sizeof *key
);
1168 if (lp
->framebuffer
.zsbuf
) {
1169 if (lp
->depth_stencil
->depth
.enabled
) {
1170 key
->zsbuf_format
= lp
->framebuffer
.zsbuf
->format
;
1171 memcpy(&key
->depth
, &lp
->depth_stencil
->depth
, sizeof key
->depth
);
1173 if (lp
->depth_stencil
->stencil
[0].enabled
) {
1174 key
->zsbuf_format
= lp
->framebuffer
.zsbuf
->format
;
1175 memcpy(&key
->stencil
, &lp
->depth_stencil
->stencil
, sizeof key
->stencil
);
1179 key
->alpha
.enabled
= lp
->depth_stencil
->alpha
.enabled
;
1180 if(key
->alpha
.enabled
)
1181 key
->alpha
.func
= lp
->depth_stencil
->alpha
.func
;
1182 /* alpha.ref_value is passed in jit_context */
1184 key
->flatshade
= lp
->rasterizer
->flatshade
;
1185 key
->scissor
= lp
->rasterizer
->scissor
;
1186 if (lp
->active_query_count
) {
1187 key
->occlusion_count
= TRUE
;
1190 if (lp
->framebuffer
.nr_cbufs
) {
1191 memcpy(&key
->blend
, lp
->blend
, sizeof key
->blend
);
1194 key
->nr_cbufs
= lp
->framebuffer
.nr_cbufs
;
1195 for (i
= 0; i
< lp
->framebuffer
.nr_cbufs
; i
++) {
1196 struct pipe_rt_blend_state
*blend_rt
= &key
->blend
.rt
[i
];
1197 const struct util_format_description
*format_desc
;
1200 format_desc
= util_format_description(lp
->framebuffer
.cbufs
[i
]->format
);
1201 assert(format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
1202 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
);
1204 blend_rt
->colormask
= lp
->blend
->rt
[i
].colormask
;
1206 /* mask out color channels not present in the color buffer.
1207 * Should be simple to incorporate per-cbuf writemasks:
1209 for(chan
= 0; chan
< 4; ++chan
) {
1210 enum util_format_swizzle swizzle
= format_desc
->swizzle
[chan
];
1212 if(swizzle
> UTIL_FORMAT_SWIZZLE_W
)
1213 blend_rt
->colormask
&= ~(1 << chan
);
1217 * Our swizzled render tiles always have an alpha channel, but the linear
1218 * render target format often does not, so force here the dst alpha to be
1221 * This is not a mere optimization. Wrong results will be produced if the
1222 * dst alpha is used, the dst format does not have alpha, and the previous
1223 * rendering was not flushed from the swizzled to linear buffer. For
1224 * example, NonPowTwo DCT.
1226 * TODO: This should be generalized to all channels for better
1227 * performance, but only alpha causes correctness issues.
1229 if (format_desc
->swizzle
[3] > UTIL_FORMAT_SWIZZLE_W
) {
1230 blend_rt
->rgb_src_factor
= force_dst_alpha_one(blend_rt
->rgb_src_factor
, FALSE
);
1231 blend_rt
->rgb_dst_factor
= force_dst_alpha_one(blend_rt
->rgb_dst_factor
, FALSE
);
1232 blend_rt
->alpha_src_factor
= force_dst_alpha_one(blend_rt
->alpha_src_factor
, TRUE
);
1233 blend_rt
->alpha_dst_factor
= force_dst_alpha_one(blend_rt
->alpha_dst_factor
, TRUE
);
1237 for(i
= 0; i
< PIPE_MAX_SAMPLERS
; ++i
)
1238 if(shader
->info
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
))
1239 lp_sampler_static_state(&key
->sampler
[i
], lp
->fragment_sampler_views
[i
], lp
->sampler
[i
]);
1243 * Update fragment state. This is called just prior to drawing
1244 * something when some fragment-related state has changed.
1247 llvmpipe_update_fs(struct llvmpipe_context
*lp
)
1249 struct lp_fragment_shader
*shader
= lp
->fs
;
1250 struct lp_fragment_shader_variant_key key
;
1251 struct lp_fragment_shader_variant
*variant
= NULL
;
1252 struct lp_fs_variant_list_item
*li
;
1254 make_variant_key(lp
, shader
, &key
);
1256 li
= first_elem(&shader
->variants
);
1257 while(!at_end(&shader
->variants
, li
)) {
1258 if(memcmp(&li
->base
->key
, &key
, sizeof key
) == 0) {
1266 move_to_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
1272 if (lp
->nr_fs_variants
>= LP_MAX_SHADER_VARIANTS
) {
1273 struct pipe_context
*pipe
= &lp
->pipe
;
1274 struct pipe_fence_handle
*fence
= NULL
;
1277 * XXX: we need to flush the context until we have some sort of reference
1278 * counting in fragment shaders as they may still be binned
1279 * Flushing alone might not be sufficient we need to wait on it too.
1281 llvmpipe_flush(pipe
, 0, &fence
);
1284 pipe
->screen
->fence_finish(pipe
->screen
, fence
, 0);
1285 pipe
->screen
->fence_reference(pipe
->screen
, &fence
, NULL
);
1287 for (i
= 0; i
< LP_MAX_SHADER_VARIANTS
/ 4; i
++) {
1288 struct lp_fs_variant_list_item
*item
= last_elem(&lp
->fs_variants_list
);
1289 remove_shader_variant(lp
, item
->base
);
1294 variant
= generate_variant(lp
, shader
, &key
);
1298 LP_COUNT_ADD(llvm_compile_time
, dt
);
1299 LP_COUNT_ADD(nr_llvm_compiles
, 2); /* emit vs. omit in/out test */
1302 insert_at_head(&shader
->variants
, &variant
->list_item_local
);
1303 insert_at_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
1304 lp
->nr_fs_variants
++;
1305 shader
->variants_cached
++;
1309 lp_setup_set_fs_variant(lp
->setup
, variant
);
1315 llvmpipe_init_fs_funcs(struct llvmpipe_context
*llvmpipe
)
1317 llvmpipe
->pipe
.create_fs_state
= llvmpipe_create_fs_state
;
1318 llvmpipe
->pipe
.bind_fs_state
= llvmpipe_bind_fs_state
;
1319 llvmpipe
->pipe
.delete_fs_state
= llvmpipe_delete_fs_state
;
1321 llvmpipe
->pipe
.set_constant_buffer
= llvmpipe_set_constant_buffer
;